@nitrosend/mcp

Optional stdio bridge for Nitrosend. Most clients should connect directly to Nitrosend's remote MCP server at https://api.nitrosend.com/mcp; this package exists for stdio-only clients and local development.

All plans, including Free, have full access to the generally available Nitrosend MCP/API/CLI surface. Plan limits apply to sending, seats, AI actions and paid add-ons. See current pricing and allowances.

For Claude Desktop, Claude.ai, and Claude Cowork, use the remote MCP connector UI. Do not install @nitrosend/cli or this stdio bridge for the standard Claude connector setup.

Manage contacts, compose emails, build automated flows, and launch campaigns through natural language.

For image media used in templates or campaigns, MCP should orchestrate rather than carry large bytes. Small chat-attached images can use nitro_ingest with kind=image and image_data; public images can use image_url when Nitro-hosted permanence is desired; larger local files should call nitro_ingest(upload: {kind: "image", filename, content_type, byte_size, checksum}), PUT bytes to direct_upload.url, then pass the returned signed_id to nitro_ingest.

Setup by client

Most clients support OAuth — sign in via your browser, no API keys needed.

Claude Code

claude mcp add --transport http nitrosend https://api.nitrosend.com/mcp

Or add to .mcp.json:

{
  "mcpServers": {
    "nitrosend": {
      "type": "http",
      "url": "https://api.nitrosend.com/mcp"
    }
  }
}

OAuth sign-in happens automatically on first use.

Claude Desktop, Claude.ai and Cowork

Nitrosend is an official connector in the Claude directory. Go to Settings → Connectors, search for Nitrosend and click Connect, or open https://claude.ai/directory/nitrosend. Sign in when prompted; no URL to paste and no API key.

If your Claude organisation restricts directory connectors, ask an organisation owner to enable Nitrosend or to add it as a custom connector with:

https://api.nitrosend.com/mcp

Prefer a one-click desktop extension? mcpb/ packages the same remote server as a Claude Desktop extension (.mcpb) with browser OAuth. See mcpb/README.md to install or build it.

Cursor

Nitrosend is an official plugin on the Cursor Marketplace. In Cursor's Agent chat, run:

/add-plugin nitrosend

Or click Add to Cursor on the Marketplace listing. The first Nitrosend tool call opens the OAuth sign-in; no API key, no config file.

Prefer to manage the server yourself? Add to ~/.cursor/mcp.json (all projects) or .cursor/mcp.json (this repo):

{
  "mcpServers": {
    "nitrosend": {
      "url": "https://api.nitrosend.com/mcp"
    }
  }
}

Cursor handles Nitrosend as a direct remote MCP server. On first use, it prompts for OAuth sign-in.

VS Code (Copilot)

Add to .vscode/mcp.json:

{
  "servers": {
    "nitrosend": {
      "type": "http",
      "url": "https://api.nitrosend.com/mcp"
    }
  }
}

VS Code handles OAuth automatically via its built-in MCP auth flow.

Windsurf

Add to ~/.codeium/windsurf/mcp_config.json:

{
  "mcpServers": {
    "nitrosend": {
      "serverUrl": "https://api.nitrosend.com/mcp"
    }
  }
}

Windsurf supports OAuth natively for HTTP servers — sign in via your browser on first use.

Codex CLI

codex mcp add nitrosend --url https://api.nitrosend.com/mcp
codex mcp login nitrosend

Or add to ~/.codex/config.toml:

[mcp_servers.nitrosend]
url = "https://api.nitrosend.com/mcp"

Then run codex mcp login nitrosend to authenticate via OAuth.

Zed

Add to your Zed settings:

{
  "context_servers": {
    "nitrosend": {
      "url": "https://api.nitrosend.com/mcp"
    }
  }
}

Any other MCP client

... View full README on GitHub